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There are four light-weight-rod samples A, B, C, D separately suspended by threads. A bar magnet is slowly brought near each sample and the following observations are noted 

(i) A is feebly repelled 

(ii) B is feebly attracted

(iii) C is strongly attracted

(iv) D remains unaffected

Which one of the following is true?

(a) C is of a diamagnetic material

(b) D is of a ferromagnetic material

(c) A is of a non-magnetic material

(d) B is of a paramagnetic material